• Title/Summary/Keyword: Fiberglass

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A Case Study of Analysis and Design for the Tunnel Stablization in Fault Zone by FRP Reinforced Grouting Method (FRP보강 그라우팅에 의한 단층대의 터널 안정성 분석 및 설계 사례 연구)

  • 박종호;최용기;박영목;권오엽;이재봉
    • Proceedings of the Korean Geotechical Society Conference
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    • 2001.03a
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    • pp.121-128
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    • 2001

  • This is a case study of stability analysis and reinforcement design for the tunnel where the collapse of the entrance slops occured along the fault zone developed in the bed rock. According to the site investigation, the main factor of sliding is the influence of fault gouge and heavy rainfall. Considering the in-situ condition, the versatile reinforcement methods is needed, and so the close investigation on the site area was accompanied with the stability analysis of tunnel and slops. The FRP(Fiberglass reinforced plastic) grouting method improved the defect of Steel Umbrella Arch Method, such as oxidation, low work efficiency, the material's heavy weight, is adapted as the reinforcement methods.

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Investigating nonlinear forced vibration behavior of multi-phase nanocomposite annular sector plates using Jacobi elliptic functions

  • Mirjavadi, Seyed Sajad;Forsat, Masoud;Barati, Mohammad Reza;Hamouda, A.M.S.
    • Steel and Composite Structures
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    • v.36 no.1
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    • pp.87-101
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    • 2020

  • A multi-scale epoxy/CNT/fiberglass annular sector plate is studied in this paper in the view of determining nonlinear forced vibration characteristics. A 3D Mori-Tanaka model is employed for evaluating multi-scale material properties. Thus, all of glass fibers are assumed to have uni-direction alignment and CNTs have random diffusion. The geometry of annular sector plate can be described based on the open angle and the value of inner/outer radius. In order to solve governing equations and derive exact forced vibration curves for the multi-scale annular sector, Jacobi elliptic functions are used. Obtained results demonstrate the significance of CNT distribution, geometric nonlinearity, applied force, fiberglass volume, open angle and fiber directions on forced vibration characteristics of multi-scale annular sector plates.

  • https://doi.org/10.12989/scs.2020.36.1.087 인용 KSCI